/* 
*/ 

#include <iostream>
extern int pow(int,int);

int main()
{
    int val = 2;
    int exp = 15;

    cout << "The Powers of 2" << endl;

    for (int cnt = 0; cnt <= exp; ++cnt)
    {
        std::cout << cnt << ":"
             << pow(val,cnt) << endl;
        ++cnt;
    }

    return 0;
}
